using System;

using System.IO;

public class Program

{

    public static void Main()

    {

        Bottom();

        Console.WriteLine("back to main end");

    }

    static void Bottom()

    {

        try

        {

            Middle();   

        }

        catch(IOException e) when (LogAndReturn("Never called", true))

        {

        }

        catch(Exception e) when (LogAndReturn("Bottom filter called", true))

        {

            Console.WriteLine("Caught in Bottom");

        }

    }

    static void Middle()

    {

        try

        {

            Top();

        }

        catch(Exception e) when (LogAndReturn("Middle filter", false))

        {

            Console.WriteLine("Caught in middle");

        }

        finally

        {

            Console.WriteLine("Middle finally");

        }

    }

    static void Top()

    {

        try

        {

            throw new Exception();

        }

        finally

        {

            Console.WriteLine("Top finally");

        }

    }

    static bool LogAndReturn(string msg, bool result)

    {

        Console.WriteLine(msg);

        return result;

    }

}